2128636 has 6 divisors (see below), whose sum is σ = 3725120. Its totient is φ = 1064316.

The previous prime is 2128631. The next prime is 2128649. The reversal of 2128636 is 6368212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266076 + ... + 266083.

2^2128636 is an apocalyptic number.

It is an amenable number.

2128636 is a deficient number, since it is larger than the sum of its proper divisors (1596484).

2128636 is a wasteful number, since it uses less digits than its factorization.

2128636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532163 (or 532161 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 2128636 is about 1458.9845783969. The cubic root of 2128636 is about 128.6373646513.

The spelling of 2128636 in words is "two million, one hundred twenty-eight thousand, six hundred thirty-six".